Double-core arbor for pipe-fittings and the like.



C. A. HAMILTON.

DOUBLE coma ARBOR FOR PIPE FITTINGS AND THE LIKE.'

APPLICATION FILED DEC. 14. 1916.

1,237,5 1 Patented Aug. 21, 1917.

same srArns PATENT onnron- CHARLES A. HAMILTON, or ANNISTON, ALABA A, Assroivon T0 ALABAMA PIPE & FOUNDRY, COMPANY, or ANNISTON, ALABAMA, A CORPORATION or ALABA A- DOUBLE-CORE ARBOR FOR PIPE-FITTINGS AND THE LIKE.

; Specification of Letters Patent.

Patented Aug. 21, 1917.

Application filed December 14, 1916. Serial No. 136,985.

To all whom it may concern:

Be it known that I, CHARLES A. HAlVIIL-.

TON, a citizen of the United States of America, residing at Anniston, in the county of 'viceand valve boxes, and all like parts which are suitable for casting in pairs, and to this end I provide a double arbor connected at each end in such manner as to brace the arbor and'make it as rigid as possible, one of the end connections being removable as a preferred arrangement in order to permit'the finished castlngs to be stripped from the arbor.

Bytying the two arbors together at each end I both facilitate and cheapen the cost of making and handling the cores, for two cores can be made at one time in one core box with approximately the same labor cost required for one core and I make easy the carrying of the double cores to the molds and facilitate the shaking out of the fittings, all of which advantages are instru- .mental in reducing the cost of manufacture. Moreover, by tying the two arbors together I save space in the flasks, making it possible to increasethe number of fitting molds per flask and to reduce the floor space necessar for a given output.

Another advantage is that the arrangement of the molds for use with the double core can be such that only one gate is necessary to pour both molds, thus economizing in metal and cutting the labor of pouring in half. v

Another advantage of tying the two arbors together is that when the two sand cores are formed thereon and the whole placed in the molds, the cores balance each other as to weight and the fixed and removable end connecting bars form handles as well as rigid core prints which make it impossible for the core to move out of position in the mold when metal is being poured, z. e., the double core is held positively and rigidly in its proper fixed position in the molds at all times.

vMy invention further comprises the novel details of construction and arrangements of parts which I have not attempted to illustrate or describe in thevariety of embodiments of which my invention is capable but which in principle and in operation will be understood by those skilled in the art by reference to the accompanying drawings wh1ch form a part of this specification, and in wh1ch:

Figure 1 illustrates in perspective view I placed in the mold.

Fig. :2 is a plan view of one form of the double arbor.

Figs. 3 and 4 are detail views showing the partsof the arbor.

. Fig. 5 is a partial perspective view of the cope.

Similar reference numerals refer to similar parts throughout the drawings.

I have illustrated my invention as adapted for forming double cores for use in a drag l in which is formed, in the manner well understood in the art, a plurality of duplex or double molds 2 adapted to receive the double sand core. The core is made for use in casting pipe fittings known as bends 'mold and the other of which is about to be body sections 5, 6 and 7, the arbor sections 5 and 6 being similar straight arbors rigidly connected at one end by an integral rigid cross bar 8 which has its under face reduced slightly between its ends where it is cast metal is poured through the gates and flows jointed to the arbors 5 and 6. Its middle portion therefore will stand slightly above the level of its ends 9 and 10 which form spaced prints for the end of-the-double arbor. The arbors 5 and 6 are rigidly con.-. nected at their other ends when in use by the section arbor 7 which constitutes in effect a detachable cross bar for that end of the double'arb'or' and has at its center a semi-circular disk 11 and ,at each end a thickened head provided with a down wardly tapering dove-tail lug 12. These lugs are adapted to lit in correspondingly shaped dove-tail downwardly tapering slots in heads 13 formed on the detached ends of the arbors 5 and 6. In the particular type of arbor shown for a right angled bend fitting, the removable arbor 7 is set at right angles to the arbors 5 and 6, and it carries at its center an integral handle and print extension 1a which, as seen in Fig. "1, projectsfrom the core and,'with the rigid cross bar 8 at the other end, form handles in line with the center of gravity of the double K fcore with'respect of which the two cores are balanced and can be conveniently and expeditiouslytransported and placed in the molds. It will be noted that the mold is formed with a seat 15 for the print 14:,

i which seat'stands opposite thereduced intermediate portion of the bar 8 between the prints '9 and 10, which prints andsaid intermediate portion are received in appropriate seats 19 therefor formed n the drag.

This causes the prints 9, 10 and l-flof adjacent cores to distribute the core weight uniformly across the sand in the drag and affords a surer and more reliable setting of the core.

' In practice, the double arbor is assembled by fitting the end section 7 onto the main sections 5 and (3 and then the arbor as a whole is set up in a mold and the double sand core formed thereon in one operation in the manner well understood in the art. The operator then grasps the center of the cross bar 8 and the print 14: and liftsthe core with ease and without any tendency of any part thereof to be strained or to give 56 in any way so as to distort the core or get anypart thereof out of line. The core is then set in the double mold formed in the drag, as shown'in Fig; 1, a cope 17 having gates 18' to registerwith'the double gate 16 in the drag is mounted on the drag, and the into the several double molds in the drag to form the casting; After the casting has been poured it is lifted out by the same con- 60" a-ft'er'which the end arborsection 7 is revenient handle portions and is shaken out,

moved and the arbor slipped. from the cast 1min beobvious that with slight modito secure by Letters Patent,'is:'

l. A double arbor formaking castings inv pairs, the arbor comprising connectingmemprinciples forming the basis of my invenbers at each end, atleastone' of which is de- 7 tachable and each of which serves as a handle for transporting the finished core.

2. A core arbor for the manufacture of hollow castings in pairs comprising, in' combination, two like body portions forming the main arbor's, transverse cross connecting members which rigidly connect'saidmain arbors and constitute both-prints and handles therefor, and meansto part the double 'arbor'to remove it from the finished castings, substantially as described. 3. In an apparatus formolding castings in pairs, a mold having a double mold cavity and asingle gate for'pouringthe same, of a core having a double core arbor rigidly connected at each end, said cross connections forming handles for the core with respect to which the weight of the arbor is balance'd, substantiallyas described; 1

4. An arbor for molding castings in pairs comprisingsimilar main body portions with 1 rigid bracing cross connections for each end, one cross connection forming prints at its ends only and the other'cross connection forming a print opposite the space between the prints at the other end of=the arbor, and

means to part the arbor to remove it from the finished castings, substantially as 'described.

' 5. In a molding apparatus for casting hollow articles in pairs, a cope, a drag comprising a series of duplex mold cavities, and

double core arbors having cross connections at each end to rigidly brace them,'said cross connections forming handles for the arbor 'and prints for the core, one handle being formed by a narrow projecting member and the other handle being formed by a cross bar reduced at the center of its under face opposite said narrow member and forming prints'only at the unreduced ends thereof, substantially as described.

6; A double core arbor for casting in'pairs hollow fittings having a lateral extension at one side thereof, said arbor comprising two main arbor sections rigidly connected by an being prints provided at the other end of integral cross member at one end which each main arbor portion, substantially as forms a handle and connected at their outer described. 10 ends by a detachable core arbor section, said In testimony whereof I afliX my signature.

latter section having projecting therefrom CHARLES A. HAMILTON.

along the center line of the double arbor a Witness: narrow print which forms a handle, there W. F. JOHNSTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

